Detection rules › Sublime MQL
Attachment: Excel Web Query File (IQY)
Recursively scans files and archives to detect IQY files. Coercing a target user into providing credentials to an attacker-controlled web server, or for SMB relaying.
Threat classification
Sublime's own taxonomy (not MITRE ATT&CK).
| Category | Values |
|---|---|
| Attack types | Credential Phishing, Malware/Ransomware |
| Tactics and techniques | Evasion |
Event coverage
| Message attribute |
|---|
| attachments (collection) |
| type |
Rule body MQL
type.inbound
and (
any(attachments, .file_extension =~ "iqy")
or (
any(attachments,
.file_extension in~ $file_extensions_common_archives
and any(file.explode(.), .file_extension =~ "iqy")
)
)
)
Detection logic
Scope: inbound message.
Recursively scans files and archives to detect IQY files. Coercing a target user into providing credentials to an attacker-controlled web server, or for SMB relaying.
- inbound message
any of:
any of
attachmentswhere:- .file_extension is 'iqy'
any of
attachmentswhere all hold:- .file_extension in $file_extensions_common_archives
any of
file.explode(.)where:- .file_extension is 'iqy'
Inspects: attachments[].file_extension, type.inbound. Sensors: file.explode. Reference lists: $file_extensions_common_archives.
Indicators matched (2)
| Field | Match | Value |
|---|---|---|
attachments[].file_extension | equals | iqy |
file.explode(attachments[])[].file_extension | equals | iqy |